Histomorphological and Histochemical Characterization of Jejunum in Domestic Pig (Sus Scrofa Domesticus)

Abstract

The present research work was conducted on six healthy adult pigs of local mixed breed of either sex to
study the microscopic anatomy of jejunum. The pointed tapering to blunt round ends of villi present in the tunica
mucosa of jejunum, were lined by simple columnar epithelium with goblet cells. Lamina propria was comprised
of irregular connective tissue, fine blood capillaries and intestinal glands. The tubulo-alveolar intestinal glands
were lined by simple cuboidal to columnar epithelium. The acini presented strong PAS positive pattern for
mucopolysaccharides. The lymphoid aggregates were also observed in the lamina propria. The descending
population of enterochromaffin cells was observed as progressed from cranial to caudal part of the jejunum.
Lamina muscularis mucosa was moderately thick and was interrupted at places due to invasion of lymphatic
nodules into it. The thickness of submucosa increased in size towards the caudal part of the jejunum with isolate
patches of lymphatic nodules. Thickness of inner circular and outer longitudinal layer of tunica muscularis was
consistent throughout the jejunum. Tunica serosa lined by loose connective tissue covered with mesothelium.